Its just wasteland 24/7 and it will never evolve from that. Ever.
I think people who argue this are missing the point of Fallout a
There's also some external threat or asshole which is preventing the wasteland from not being the wasteland, it's the point of several antagonists dude IDK how so many Bethesda Haters miss the point. A lot of people didn't pay attention to the differences and circumstances of West Coast vs East Coast
Fallout East Coast had the Supermutants, Ghouls, Enclave AND Institute preventing safe expansion and it's only thanks to the efforts of the Brotherhood that they
finally manage to make some progress in clearing the wastes
(Which took them like two decades). Let's reiterate what it took to make minor progress, it took potentially HUNDREDS of highly trained and experienced operatives in a light tank equivalent armor just to make a small section of the East.
Appalachia is presumably a lost cause because of a fungal plague and giant colonies of super radiated plane sized Bats, like what the fuck do you expect a post apocalypse society to do against a nest of hundreds of these?
Fallout West Coast only got as far as it did because of the Protagonist macguffing away the Enclave and Master both of which would have wiped out the NCR were it not for them (The Supermutants in the West Coast decided to fuck off unlike the ones in the East). The West Coast also had an advantage of you know having one of the most populated vaults in the setting?
Most vaults in all of the Fallout canon are mentioned to only sustain a few hundred people or less, the Vaults in the West Coast had a much higher average than the ones in the East Coast so of course it's easier for them to build up quicker than the East (Not mentioning that the Supermutants in the West are reasonable unlike the East) Vault 13 alone starts with 1,000 people which is significantly higher above the average vault populations.
To put this into perspective three East Coat Vaults
Vault 92 (245 Vault Dwellers)
Vault 106 (Less than 200)
Vault 108 (475)
Still less than a thousand. Higher Population = More Protection = More manpower to rebuild. The West is able to build a civilization because all their threats were handled sooner and they had more factors helping them than the East Coast. Furthermore, the NCR in the Fallout TV show aren't in a "Wasteland" they're in a offscreen civil war
(
Their Capital legitimately got nuked that's why it looks like shit, the series gives us a brief glimpse of the capital looking like a utopia BEFORE it got nuked) and the whole fucking point of the season was to re-unify the NCR stronger than ever with the Cold Fusion tech (Which would let them recover from Shady Sands really quick).
TLDR;
Stop bitching about the NCR, their capital got nuked which presumably killed tens of thousands according to the population billboard on top of a lot of the NCR leadership which had multiple people fighting over leadership until the main antagonist finds a way to unify them and would have rebuilt the NCR practically over night had their plan worked.